Mark,
Motobecane GT frames and bikes show up on eBay quite frequently. Unfortunately a lot of them tend to be in the larger sizes.
Another consideration would be a Grand Jubile. They have pretty similar frame geometry. The early 70s bikes had the 3 main tubes Reynolds 531. Later versions were Vitus 172 main tubes or complete Vitus 172 frames.
If you don't find one, a competent frame builder can easily replace the broken dropout.
Chas. Colerich Oakland, CA USA
-----Original Message----- From: Mark Greenberg Sent: Mon, Jul 27, 2009 7:18 am Subject: [CR] WTB: 70's Motobecane Grand Touring frameset, 54-56ish
Morning All! I'm resending this request just in case...THANKS!